<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1692-3561</journal-id>
<journal-title><![CDATA[Biotecnología en el Sector Agropecuario y Agroindustrial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Bio.Agro]]></abbrev-journal-title>
<issn>1692-3561</issn>
<publisher>
<publisher-name><![CDATA[Taller Editorial Universidad del Cauca]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1692-35612011000100014</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[FILMES Y REVESTIMIENTOS COMESTIBLES COMO EMPAQUES ACTIVOS BIODEGRADABLES EN LA CONSERVACIÓN DE ALIMENTOS]]></article-title>
<article-title xml:lang="en"><![CDATA[EDIBLE FILMS AND COATINGS AS BIODEGRADABLE ACTIVE PACKAGING IN THE PRESERVATION OF FOOD PRODUCTS]]></article-title>
<article-title xml:lang="pt"><![CDATA[FILMES E REVESTIMENTOS COMESTÍVEIS COMO EMBALAGEM ATIVA BIODEGRADÁVEL NA CONSERVAÇÃO DE ALIMENTOS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[DURANGO]]></surname>
<given-names><![CDATA[ALBA MANUELA]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SOARES]]></surname>
<given-names><![CDATA[NILDA DE FÁTIMA]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[ARTEAGA]]></surname>
<given-names><![CDATA[MARGARITA ROSA]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Córdoba Departamento de Ingeniería de Alimentos ]]></institution>
<addr-line><![CDATA[Montería ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Federal de Viçosa Departamento de Tecnología de Alimentos ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad de Córdoba Departamento de Ingeniería de Alimentos ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<volume>9</volume>
<numero>1</numero>
<fpage>112</fpage>
<lpage>118</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1692-35612011000100014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1692-35612011000100014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1692-35612011000100014&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los filmes y revestimientos comestibles son una innovación dentro del concepto de empaque activo biodegradable, los cuales interactúan con los alimentos con el fin de extender su vida útil, mejorar su seguridad y/o propiedades sensoriales o funcionales, mientras mantiene la calidad del alimento empacado. El uso de filmes y revestimientos comestibles a base de biopolímeros ha tomado un auge importante en la industria de alimentos, debido a muchos factores como sus características de biodegradabilidad, que contribuyen a disminuir la contaminación ambiental, su potencial para evitar la alteración de los alimentos y la posibilidad de generar nuevos mercados a productos derivados de fuentes naturales renovables. Los filmes y revestimientos comestibles han demostrado ser efectivos en la preservación de muchos alimentos, especialmente en frutas y hortalizas para mantener su apariencia fresca, su firmeza, el brillo, aumentando la calidad del producto y su valor comercial.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Edible films and coatings are an innovation within biodegradable active packaging concept, which interacts with food in order to extend shelf life, improve safety and/or functional or sensory properties while maintaining the quality of food packaging. The use of edible films and coatings based on biopolymers has taken a major boom in the food industry due to many factors such as biodegradability characteristics that contribute to reducing environmental pollution, its potential to prevent the alteration of food and the ability to generate new markets for products derived from renewable natural sources edible films and coatings have proved to be effective in the preservation of many foods, especially fruits and vegetables maintain their fresh appearance, firmness, brightness, increasing product quality and commercial value.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Os Filmes e revestimentos comestíveis são uma inovação do conceito de embalagem ativa biodegradável, os quais interagem com os alimentos com o fim de estender sua vida útil, melhorar sua segurança y/o propriedades sensoriais o funcionais, enquanto mantêm a qualidade do alimento empacado. O uso de filmes e revestimentos comestíveis a base de biopolímeros têm-se tornado importante na indústria de alimentos, devido a fatores tais como suas características de biodegradabilidade, que contribuem a diminuir a contaminação ambiental; seu potencial para evitar a alteração dos alimentos e a possibilidade de gerar novos mercados a produtos originários de fontes naturais renováveis. Os filmes e revestimentos comestíveis têm demonstrado ser efetivos na preservação de muitos alimentos, especialmente em frutas e hortaliças para manter sua aparência fresca, sua firmeza, o brilho, aumentando a qualidade do produto y seu valor comercial.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Filmes y revestimientos comestibles]]></kwd>
<kwd lng="es"><![CDATA[Empaque activo]]></kwd>
<kwd lng="es"><![CDATA[Empaques biodegradables]]></kwd>
<kwd lng="es"><![CDATA[Empaque antimicrobiano]]></kwd>
<kwd lng="en"><![CDATA[Edible films and coatings]]></kwd>
<kwd lng="en"><![CDATA[Active packaging]]></kwd>
<kwd lng="en"><![CDATA[Biodegradable packaging]]></kwd>
<kwd lng="en"><![CDATA[Antimicrobial packaging]]></kwd>
<kwd lng="pt"><![CDATA[Filmes e revestimentos comestíveis]]></kwd>
<kwd lng="pt"><![CDATA[Embalagem ativo]]></kwd>
<kwd lng="pt"><![CDATA[Embalagens blodegradávels]]></kwd>
<kwd lng="pt"><![CDATA[Embalagem antimicrobiano]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <font face="Verdana" size="2">      <center>     <p><b><font size="4">FILMES Y REVESTIMIENTOS COMESTIBLES COMO EMPAQUES ACTIVOS BIODEGRADABLES EN LA CONSERVACI&Oacute;N DE ALIMENTOS</font></b></p>      <p><b><font size="3">EDIBLE FILMS AND COATINGS AS BIODEGRADABLE ACTIVE PACKAGING IN THE PRESERVATION OF FOOD PRODUCTS</font></b></p>      <p><b><font size="3">FILMES E REVESTIMENTOS COMEST&Iacute;VEIS COMO EMBALAGEM ATIVA BIODEGRAD&Aacute;VEL NA CONSERVA&Ccedil;&Atilde;O DE ALIMENTOS</font></b></p>      <p><b>ALBA MANUELA DURANGO<a name="1"></a><a href="#1a"><sup>1</sup></a>, NILDA DE F&Aacute;TIMA SOARES<a name="2"></a><a href="#2a"><sup>2</sup></a>, MARGARITA ROSA ARTEAGA<a name="3"></a><a href="#3a"><sup>3</sup></a></b></p> </center>       <p><sup><a name="1a"></a><a href="#1">1</a></sup> Bacteri&oacute;loga, Ph.D. en Ciencia y Tecnolog&iacute;a de Alimentos, Profesor Titular del Departamento de Ingenier&iacute;a de Alimentos, Universidad de C&oacute;rdoba, Monter&iacute;a. Colombia.</p>      <p><sup><a name="2a"></a><a href="#2">2</a></sup> Ingeniera de Alimentos, Ph.D. en Ciencia de Alimentos, Profesor Titular del Departamento de Tecnolog&iacute;a de Alimentos, Universidad Federal de Vi&ccedil;osa, Vi&ccedil;osa-MG. Brazil.</p>      <p><sup><a name="3a"></a><a href="#3">3</a></sup> Ingeniera de Alimentos, M.Sc en Ciencia y Tecnolog&iacute;a de la Leche, Profesor Asistente del Departamento de Ingenier&iacute;a de Alimentos, Universidad de C&oacute;rdoba, Monter&iacute;a. Colombia.</p>      <p><b>Correspondencia</b>: <a href="mailto:adurango@sinu.unicordoba.edu.co">adurango@sinu.unicordoba.edu.co</a></p>      ]]></body>
<body><![CDATA[<p><b>Recibido para evaluaci&oacute;n</b>: 8 de noviembre de 2009. <b>Aprobado para publicaci&oacute;n</b>: 26 de marzo de 2011.</p> <hr>    <br>      <p><b><font size="3">RESUMEN</font></b></p>      <p><i>Los filmes y revestimientos comestibles son una innovaci&oacute;n dentro del concepto de empaque activo biodegradable, los cuales interact&uacute;an con los alimentos con el fin de extender su vida &uacute;til, mejorar su seguridad y/o propiedades sensoriales o funcionales, mientras mantiene la calidad del alimento empacado. El uso de filmes y revestimientos comestibles a base de biopol&iacute;meros ha tomado un auge importante en la industria de alimentos, debido a muchos factores como sus caracter&iacute;sticas de biodegradabilidad, que contribuyen a disminuir la contaminaci&oacute;n ambiental, su potencial para evitar la alteraci&oacute;n de los alimentos y la posibilidad de generar nuevos mercados a productos derivados de fuentes naturales renovables. Los filmes y revestimientos comestibles han demostrado ser efectivos en la preservaci&oacute;n de muchos alimentos, especialmente en frutas y hortalizas para mantener su apariencia fresca, su firmeza, el brillo, aumentando la calidad del producto y su valor comercial.</i></p>      <p><b>PALABRAS CLAVE</b>:</p>      <p>Filmes y revestimientos comestibles, Empaque activo, Empaques biodegradables, Empaque antimicrobiano.</p>     <br>      <p><b><font size="3">ABSTRACT</font></b></p>      <p><i>Edible films and coatings are an innovation within biodegradable active packaging concept, which interacts with food in order to extend shelf life, improve safety and/or functional or sensory properties while maintaining the quality of food packaging. The use of edible films and coatings based on biopolymers has taken a major boom in the food industry due to many factors such as biodegradability characteristics that contribute to reducing environmental pollution, its potential to prevent the alteration of food and the ability to generate new markets for products derived from renewable natural sources edible films and coatings have proved to be effective in the preservation of many foods, especially fruits and vegetables maintain their fresh appearance, firmness, brightness, increasing product quality and commercial value.</i></p>      <p><b>KEYWORDS</b>:</p>     ]]></body>
<body><![CDATA[<br>      <p>Edible films and coatings, Active packaging, Biodegradable packaging, Antimicrobial packaging.</p>     <br>      <p><b><font size="3">RESUMO</font></b></p>      <p><i>Os Filmes e revestimentos comest&iacute;veis s&atilde;o uma inova&ccedil;&atilde;o do conceito de embalagem ativa biodegrad&aacute;vel, os quais interagem com os alimentos com o fim de estender sua vida &uacute;til, melhorar sua segurança y/o propriedades sensoriais o funcionais, enquanto mant&ecirc;m a qualidade do alimento empacado. O uso de filmes e revestimentos comest&iacute;veis a base de biopol&iacute;meros t&ecirc;m-se tornado importante na ind&uacute;stria de alimentos, devido a fatores tais como suas caracter&iacute;sticas de biodegradabilidade, que contribuem a diminuir a contamina&ccedil;&atilde;o ambiental; seu potencial para evitar a altera&ccedil;&atilde;o dos alimentos e a possibilidade de gerar novos mercados a produtos origin&aacute;rios de fontes naturais renov&aacute;veis. Os filmes e revestimentos comest&iacute;veis têm demonstrado ser efetivos na preserva&ccedil;&atilde;o de muitos alimentos, especialmente em frutas e hortali&ccedil;as para manter sua apar&ecirc;ncia fresca, sua firmeza, o brilho, aumentando a qualidade do produto y seu valor comercial.</i></p>      <p><b>PALABRAS-CHAVE</b></p>      <p>Filmes e revestimentos comest&iacute;veis, Embalagem ativo, Embalagens blodegrad&aacute;vels, Embalagem antimicrobiano.</p>     <br>      <p><b><font size="3">INTRODUCCI&Oacute;N</font></b></p>      <p>Las investigaciones sobre empaques se han enfocado en filmes y revestimientos comestibles, debido a factores como la demanda de los consumidores por alimentos de alta calidad, necesidad de nuevas t&eacute;cnicas de almacenamiento para la industria alimentaria, conceptos ambientales sobre la disposici&oacute;n de materiales renovables para empaques, y oportunidades para crear nuevos mercados mediante el uso de residuos agr&iacute;colas.</p>      ]]></body>
<body><![CDATA[<p>Los filmes y revestimientos comestibles son elaborados a base de biopol&iacute;meros, como prote&iacute;nas, l&iacute;pidos y polisac&aacute;ridos derivados de fuentes naturales renovables que son completamente biodegradados en un per&iacute;odo de tiempo considerablemente corto, contribuyendo as&iacute; a reducir la contaminaci&oacute;n del medio ambiente &#91;1, 2, 3, 4, 5, 6&#93;.</p>      <p>Los filmes y revestimientos comestibles son un tema de gran inter&eacute;s porque adem&aacute;s de su biodegradabilidad, tienen un gran potencial para evitar el deterioro de muchos productos alimenticios &#91;7, 8, 9&#93;.</p>      <p>El objetivo de este trabajo es presentar una revisi&oacute;n sobre los filmes y revestimientos comestibles, su desarrollo, aplicaciones y usos en la industria de alimentos.</p>     <br>      <p><b>Filmes y revestimientos comestibles</b></p>      <p>Los filmes y revestimientos comestibles act&uacute;an como una barrera a los elementos externos, protegiendo el producto y extendiendo su vida &uacute;til &#91;6, 10, 11, 12, 13&#93;. Se presentan en formas diferentes; como filme es una fina pel&iacute;cula formada separadamente del alimento y aplicada despu&eacute;s sobre el mismo; como revestimiento o recubrimiento, es una suspensi&oacute;n o emulsi&oacute;n aplicada directamente sobre la superficie del alimento donde es secada formando una fina pel&iacute;cula sobre el producto &#91;6, 7, 14&#93;.</p>      <p>El empleo filmes y revestimientos comestibles en alimentos no es una novedad, desde el siglo XII los chinos aplicaban cera en las naranjas y limones, para aumentar la vida &uacute;til de esas frutas &#91;15&#93;.</p>     <br>      <p>Composici&oacute;n de los Filmes y Revestimientos</p>      <p>Los filmes y revestimientos comestibles pueden ser elaborados a partir de biopol&iacute;meros como polisac&aacute;ridos, prote&iacute;nas e l&iacute;pidos, los cuales presentan bondades como su biodegradabilidad, comestibilidad, apariencia est&eacute;tica, buenas propiedades de barreras contra el ox&iacute;geno y vapor de agua &#91;10&#93;. De acuerdo a su composici&oacute;n los filmes y revestimientos comestibles pueden ser clasificados en tres categor&iacute;as:</p>  <ol>     ]]></body>
<body><![CDATA[<li> Hidrocoloidales, son elaborados a base de polisac&aacute;ridos o prote&iacute;nas, los cuales presentan baja permeabilidad al ox&iacute;geno, di&oacute;xido de carbono y l&iacute;pidos; pero alta permeabilidad al vapor de agua, debido a su naturaleza hidrof&iacute;lica &#91;7&#93;.</li>      <li> Lip&iacute;dicos, son a base de l&iacute;pidos, los cuales por su hidrofobicidad presentan baja permeabilidad al vapor de agua &#91;1&#93;.</li>      <li>Compuestos, que son a base de prote&iacute;nas mas l&iacute;pidos o polisac&aacute;ridos mas l&iacute;pidos. En la actualidad, las investigaciones se han focalizadas sobre este tipo de filmes y revestimientos, porque combinan las ventajas de cada uno de los componentes utilizados, reduciendo as&iacute; sus desventajas &#91;7&#93;. La adici&oacute;n de aceite de girasol a revestimientos a base de almid&oacute;n de ma&iacute;z, disminuy&oacute; significativamente la permeabilidad al vapor de agua de los revestimientos &#91;16&#93;.</li>     </ol>      <p>Los polisac&aacute;ridos que se utilizan en la elaboraci&oacute;n de filmes y revestimientos comestibles son los derivados de la celulosa (metilcelulosa MC, hidroximetil celulosa HMC, hidroxipropil metilcelulosa HPMC y carboximetilcelulosa CMC), el almid&oacute;n, quitosano, alginato, carragenina, pectina, pululana, entre otros &#91;17&#93;. Dentro de los polisac&aacute;ridos el almid&oacute;n es el biopol&iacute;mero natural m&aacute;s empleado. El uso del almid&oacute;n puede ser una interesante alternativa para filmes y revestimientos comestibles debido a su f&aacute;cil procesamiento, bajo costo, abundancia, biodegradabilidad, comestibilidad y f&aacute;cil manipulaci&oacute;n &#91;18, 19&#93;. Las fuentes principales de almid&oacute;n utilizadas en la elaboraci&oacute;n de filmes y revestimientos comestibles son el ma&iacute;z, yuca, &ntilde;ame, papa, trigo, etc.</p>      <p>El almid&oacute;n de &ntilde;ame (<i>Dioscorea sp</i>) es considerado una buena fuente para la producci&oacute;n de filmes y revestimientos comestibles, por su contenido de amilosa, su estabilidad a altas temperaturas y bajos pH &#91;20&#93;. Filmes elaborados a base de almid&oacute;n de &ntilde;ame y glicerol presentan permeabilidad al vapor de agua de 4,58 g mm kPa-1 d-1 m-2 (0,529 x 10-10 g m-1 s-1 Pa-1), &#91;21&#93; menor que la reportada por otros autores &#91;18, 22&#93; en las mismas condiciones de temperatura y humedad relativa y con gran potencial de aplicaci&oacute;n en la industria de alimentos.</p>      <p>Dentro de las prote&iacute;nas se vienen utilizando las de origen animal como gelatina, col&aacute;geno, la case&iacute;na y las prote&iacute;nas del suero de queso, y las de origen vegetal como la ze&iacute;na, que es una prote&iacute;na obtenida del ma&iacute;z, gluten de trigo, soya &#91;10, 14, 23&#93;.</p>      <p>Los l&iacute;pidos m&aacute;s utilizados son las ceras (de abeja, de carna&uacute;ba, de parafina), aceite mineral y vegetal y acetilglic&eacute;ridos, entre otros &#91;17&#93;.</p>      <p>Un componente importante en la formaci&oacute;n de los filmes y revestimientos, son los plastificantes, que son substancias no vol&aacute;tiles con alto punto de fusi&oacute;n que cuando son adicionados a un material, mudan sus propiedades f&iacute;sicas y/o mec&aacute;nicas &#91;24&#93;. Los plastificantes m&aacute;s usados en la elaboraci&oacute;n de filmes y revestimientos comestibles son el glicerol y el sorbitol, que act&uacute;an a nivel de los puentes de hidr&oacute;geno reduciendo las fuerzas intermoleculares a lo largo de las cadenas del pol&iacute;mero, mejorando en ellos sus propiedades mec&aacute;nicas como flexibilidad, fuerza y resistencia &#91;25, 26&#93;. Igualmente, pueden mejorar las propiedades de barrera al vapor de agua; la adici&oacute;n de sorbitol y glicerol a filmes y revestimientos a base de almid&oacute;n de ma&iacute;z y de batata, con diferentes contenidos de amilosa, mejor&oacute; sus propiedades de barrera al vapor de agua, a mayor concentraci&oacute;n del plastificante en los revestimientos menor fue la permeabilidad al vapor de agua, siendo los revestimientos con sorbitol los que presentaron los menores valores de permeabilidad &#91;27&#93;. La adici&oacute;n de plastificante y l&iacute;pidos al mismo tiempo en los filmes y revestimientos disminuyen a&uacute;n m&aacute;s la permeabilidad al vapor de agua &#91;16&#93;.</p>     <br>      ]]></body>
<body><![CDATA[<p><b>Filmes y Revestimientos Comestibles Antimicrobianos</b></p>      <p>Una innovaci&oacute;n de los filmes y revestimientos comestibles es que pueden servir de veh&iacute;culos para diferentes sustancias como antimicrobianos, vitaminas, nutrientes, saborizantes, antioxidantes, colorantes u otro ingrediente funcional que interact&uacute;a con el alimento para mejorar su estabilidad, seguridad, calidad y funcionabilidad &#91;28, 29, 30, 31, 13, 32&#93;. Los filmes y revestimientos antimicrobianos pueden reducir, inhibir o retardar el crecimiento de los microorganismos presentes en los alimentos &#91;33&#93;. La contaminaci&oacute;n microbiana reduce la vida &uacute;til de los alimentos y aumenta el riesgo de enfermedades transmitidas por alimentos. La contaminaci&oacute;n microbiana es mayor en la superficie del producto y los filmes y revestimientos antimicrobianos a trav&eacute;s del contacto con los alimentos y la liberaci&oacute;n de los compuestos antimicrobianos tienen una funci&oacute;n importante en la conservaci&oacute;n de los alimentos &#91;33&#93;. El crecimiento de los microorganismos tanto pat&oacute;genos como alterantes puede ser prevenido por la incorporaci&oacute;n de agentes antimicrobianos en los filmes o revestimientos &#91;34&#93;.</p>      <p>Tradicionalmente, los antimicrobianos son adicionados directamente en los alimentos, pero su actividad puede ser inhibida por muchas substancias del propio alimento. Por ejemplo, en la leche el contenido de grasa puede interactuar con la nisina reduciendo su actividad antimicrobiana sobre <i>Listeria monocytogenes</i> &#91;35&#93;. Otra investigaci&oacute;n muestra que el &aacute;cido s&oacute;rbico cuando es incorporado en filmes a base de pectina, gluten y monoglic&eacute;ridos presenta una mayor actividad antimicrobiana sobre el crecimiento de hongos, que cuando es adicionado directamente sobre el alimento &#91;2&#93;. Esto hace que los filmes y revestimientos antimicrobianos sean m&aacute;s eficientes en la conservaci&oacute;n de los alimentos.</p>      <p>Los antimicrobianos m&aacute;s utilizados en filmes y revestimientos comestibles son los &aacute;cidos org&aacute;nicos o sus sales, como &aacute;cido s&oacute;rbico, &aacute;cido propi&oacute;nico, sorbato de potasio, &aacute;cido benz&oacute;ico, benzoato de sodio, &aacute;cido c&iacute;trico; bacteriocinas como nisina, pediocina; enzimas como peroxidasa, lisozima y polisac&aacute;ridos con propiedades antimicrobianas naturales como el quitosano &#91;36, 34, 37, 38, 39, 40,17&#93;. El quitosano ha sido muy utilizado en la composici&oacute;n de filmes y revestimientos antimicrobianos por su acci&oacute;n bactericida y fungicida, debida a su capacidad de ligarse a las mol&eacute;culas de agua e inactivar las enzimas microbianas &#91;5, 41, 42&#93;. Revestimientos antimicrobianos a base de almid&oacute;n de &ntilde;ame y 1,5&#37; de quitosano controlan en la zanahoria m&iacute;nimamente procesada la poblaci&oacute;n de coliformes totales, psicrotr&oacute;ficos, mes&oacute;filos aerobios, bacterias l&aacute;cticas y hongos &#91;18, 38&#93;. Un filme antimicrobiano desarrollado a base de almid&oacute;n de &ntilde;ame y quitosano reduce en 2 ciclos log el crecimiento de <i>Salmonella enteritides</i> &#91;39&#93;. Investigaciones realizadas han demostrado que los filmes y revestimientos comestibles antimicrobianos pueden ser una alternativa viable para controlar el crecimiento microbiano en frutas y hortalizas m&iacute;nimamente procesadas y aumentar su vida &uacute;til.</p>     <br>      <p><b>Aplicaciones en la Industria de Alimentos</b></p>      <p>Los filmes y revestimientos comestibles tienen mucha aplicaci&oacute;n en la industria de alimentos. Filmes y revestimientos comestibles son usados con mucha frecuencia como barreras para l&iacute;pidos, vapor de agua, gas y flavor en frutas y vegetales frescos y m&iacute;nimamente procesados, confiter&iacute;a, alimentos congelados y productos c&aacute;rnicos &#91;28, 43, 2, 44, 45, 46&#93;.</p>      <p>Filmes comestibles a base de prote&iacute;na aislada de suero (WPI) y acetilmonoglic&eacute;ridos se han utilizado en la conservaci&oacute;n del salm&oacute;n congelado para disminuir la p&eacute;rdida de agua y la oxidaci&oacute;n de los l&iacute;pidos &#91;47, 48&#93;.</p>      <p>Una aplicaci&oacute;n interesante de los empaques comestibles es en alimentos para fritar, los cuales durante el proceso de fritura absorben l&iacute;pidos, ocasionando un problema de salud en personas obesas o con enfermedades cardiovasculares, revestimientos comestibles elaborados a base de Metilcelulosa y sorbitol utilizado en papas a la francesa reducen la entrada de aceite en el momento de la fritura hasta de un 40,6&#37; &#91;49&#93;. Revestimientos a base de prote&iacute;na de soya/prote&iacute;na de suero y metilcelulosa/prote&iacute;na de soya aplicados en productos de pasteler&iacute;a, reducen durante el proceso de fritura la adsorci&oacute;n de grasa en un 99,8&#37; y 83,5&#37;, respectivamente y adem&aacute;s, disminuyen la p&eacute;rdida de agua durante el mismo &#91;50&#93;.</p>      <p>Otra aplicaci&oacute;n muy utilizada por la industria, es en alimentos con diferentes contenidos de humedad listos para el consumo, como cereales secos con uvas pasas, las cuales poseen una humedad del 13 a 18&#37;, mientras los cereales tienen del 2 a 3&#37;, si las uvas no son cubiertas con un revestimiento comestible pueden perder agua y tornarse secas y los cereales ganar esa agua y perder la crocancia, ocasionando una p&eacute;rdida de calidad en el producto. Revestimientos elaborados a base de Metilcelulosa y &aacute;cido palm&iacute;tico conservan el helado Sundae manteniendo crujiente el cono por 3 meses a -23&deg;C, al evitar que la humedad del helado pase al mismo &#91;51&#93;.</p>      ]]></body>
<body><![CDATA[<p>Los filmes y revestimientos comestibles han sido muy utilizados en la industria de frutas y hortalizas enteras y m&iacute;nimamente procesadas &#91;23, 52,13, 53&#93;. Recubrimientos o revestimientos a base de quitosano aplicados en mandarinas "Fortune" redujeron la p&eacute;rdida de peso y mejoraron la firmeza con respecto al control &#91;54&#93;. Revestimientos elaborados a base de almid&oacute;n de &ntilde;ame conservan el color brillante de la zanahoria m&iacute;nimamente procesada despu&eacute;s de 15 d&iacute;as de almacenamiento &#91;18&#93;. Revestimientos comestibles a base de los polisac&aacute;ridos alginato y gelano prolongaron la vida &uacute;til de las manzanas Fuji cortadas hasta 2 semanas, mientras la vida &uacute;til en las manzanas no revestidas fue menor de 4 d&iacute;as &#91;29&#93;.</p>     <br>      <p><b><font size="3">CONCLUSIONES</font></b></p>      <p>Los filmes y revestimientos comestibles elaborados a partir de biopol&iacute;meros presentan numerosas ventajas, entre ellas la de ser biodegradables, reciclables, pueden transportar aditivos, poseer buenas propiedades de barrera y mec&aacute;nicas; mejoran la apariencia de los alimentos y protegen sus propiedades durante el almacenamiento y manipulaci&oacute;n. Mantienen o mejoran las caracter&iacute;sticas sensoriales y la textura en los alimentos &#91;55&#93; adicionan valor nutricional al producto, espec&iacute;ficamente los producidos a base de prote&iacute;nas &#91;56&#93;. Investigaciones en filmes y revestimientos comestibles son muy importantes, porque adem&aacute;s de sus muchos beneficios y aplicaciones en alimentos, presenta efectos positivos para el ambiente, por su particularidad de ser biodegradables.</p> <hr>    <br>      <p><b><font size="3">REFERENCIAS</font></b></p>      <!-- ref --><p>&#91;1&#93; GUILBERT, S., GONTARD, N. and GORRIS G. Prolongation of the Self-life of Perishable Food Products using Biodegradable Films and Coatings. Lebensmittel- Wissenschoft und-Technologie., 29(1-2), 1996, p.10-17.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000069&pid=S1692-3561201100010001400001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>&#91;2&#93; GUILBERT, S., CUQ, B. and GONTARD, N. Recent innovations in edible and / or biodegradable packaging materials. 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